Helsinki is the capital and most populous city in Finland. It is located on the shore of the Gulf of Finland and serves as the seat of the Uusimaa region in southern Finland. Approximately 675,000 people live in the municipality, with 1.25 million in the capital region, and 1.58 million in the metropolitan area. As the most populous urban area in Finland, it is the country's most significant centre for politics, education, finance, culture, and research. Helsinki is situated 80 kilometres (50 mi) to the north of Tallinn, Estonia, 360 kilometres (220 mi) to the north of Riga, Latvia, 400 kilometres (250 mi) to the east of Stockholm, Sweden, and 300 kilometres (190 mi) to the west of Saint Petersburg, Russia. Helsinki has significant historical connections with these four cities.

Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, opposite Estonia. Finland covers an area of 338,145 square kilometres (130,559 sq mi) and has a population of 5.6 million. Helsinki is the capital and largest city. The vast majority of the population are ethnic Finns. The official languages are Finnish and Swedish, of which 84.9 percent and 5.1 percent of the population speak the first as their mother tongue. Finland's climate varies from humid continental in the south to boreal in the north. The land cover is predominantly boreal forest biome, with more than 180,000 recorded lakes.